Its a great feature but I'll do you one better (or orthogonal):

There are apps that let you set block ranges so when you get a million calls from variations of something like 1-876-543-2109, you can block all of them with basically whatever granularity you need 1+ digits) It should be built in but you have to buy it for like $3-4, but absolutely worth it

I have kids and sometimes it's important thing from a doctor/school/whatever that I want to get.

However, I'm lucky that my cell phone area code is nowhere near where I live, so if I see an area code near my phones area code, I know it's almost certainly spam. If I get a call from near where I live, its almost certainly legitimate.